When a promise, goal, or wish has not been completed or satisfied.
From 'un-' (a prefix meaning 'not') and 'fulfilled' (from Latin: 'fillus' meaning 'full,' with the suffix '-ful' meaning 'full of'). The word combines to literally mean 'not-made-full.'
Psychologists call the anxiety you feel from unfulfilled goals the 'Zeigarnik effect'—your brain actually remembers incomplete tasks better than finished ones, which is why you can't stop thinking about something you didn't finish!
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